Adam has some $20-notes and some $10-notes that add up to $200.
There are 4 less $10-notes than $20-notes.
- What is the value of the extra 4 $20-notes?
- What is the value of one $20-note and one $10-note?
- How many $10 notes are there?
- How many $20 notes are there?
(a)
Value of the extra 4 $20 notes
= 4 x 20
= $80
(b)
Value of one $20-note and one $10-note
= 20 + 10
= $30
(c)
Number of $10 notes
= (200 - 80) ÷ 30
= 120 ÷ 30
= 4
(d)
Number of $20 notes
= 4 + 4
= 8
Answer(s): (a) $80; (b) $30; (c) 4; (d) 8